An Etymological Dictionary of Astronomy and Astrophysics

1. To travel to or in a place for the purpose of discovery.
   

2. To make a careful investigation or study of something.

Etymology (EN): From L. explorare “investigate, search out;” said to be originally a hunters’ term meaning “set up a loud cry,” from → ex- “out” + plorare “to cry.”

Etymology (PE): Puyidan, originally “to run, trot; wander,” from Mid.Pers. pôy-, pwd- “to run;” cf. Gk. speudein “to hasten;” Lith. spudinti.